To switch from a 700R4 to a TH350, you need to:
1. Remove the 700R4: This involves disconnecting the driveshaft, cooler lines, shifter linkage, and any electrical connections (if applicable, like for a lockup torque converter). You'll likely need transmission jacks and various wrenches.
2. Install the TH350: This is the reverse process of removal, but with the TH350. You'll need to ensure the correct bellhousing is used for your engine (the TH350 bellhousing is different from the 700R4's). The torque converter will also be different and needs to be matched to the TH350.
3. Shifter Linkage Adjustment: The TH350 uses a simpler linkage than the 700R4, You'll likely need to adjust or replace your shifter linkage to match the TH350's setup. This often involves bending the linkage rods or using an entirely different shifter setup.
4. Cooler Lines and other Connections: Reconnect the cooler lines and any other components you disconnected earlier. The cooler lines might need adaptation depending on the specific configuration.
5. Verify Installation: Before starting the engine, double-check all connections to ensure everything is secure.
Important Considerations:
* Bellhousing: The TH350 and 700R4 use different bellhousings. You MUST use the correct bellhousing for your engine and transmission.
* Torque Converter: The torque converters are not interchangeable. You need a TH350 torque converter.
* Driveshaft: The length of the driveshaft may need to be adjusted as the TH350 sits differently in the vehicle compared to the 700R4.
* Wiring: If your 700R4 had any electrical connections (for the lockup clutch), these will need to be disconnected and possibly re-routed or removed altogether, depending on the year and model of the vehicle.
* Computer Control: The 700R4 often integrates with the vehicle's computer system for things like shift control and lockup torque converter function. The TH350 is generally simpler and may require some modifications to the computer or removal of certain sensors. This is a more advanced consideration.
* Professional Installation: This is a major transmission swap and is best left to experienced mechanics. Improper installation can lead to serious damage to your vehicle.
In short, it's a substantial undertaking, requiring mechanical expertise and the right tools. Don't attempt this unless you have significant automotive experience. If you're unsure, consult a professional transmission shop.
